A cube has a surface area of 150in2 What is the length of a side?
Every cube has 6 outside surfaces. Divide 150 square inches by six to determine the surface area of each surface. The result is 25 square inches.
This is a cube. Each edge is exactly the same length and each surface is a square. Each square surface has exactly the same surface area. To determine the length of each side, take the square root of 25 square inches. The answer is 5 inches.